Operating System : Windows 10 Home & Pro MAR, Ubuntu Linux, Free DOS Chipset : Intel Q270 Processors : Intel Celeron, Intel Pentium, Intel Core i3, i5, i7 6th & 7th Gen Memory Support : Four (4) DIMM slots , Up to 64 GB DDR4 Hard Drive : Sata or SSD Removable Media : Optional External Bays : One 5.25", One slim ODD, 1 SD 4 card reader Expansion Slots : 1 M.2 2230 for optional wireless NIC, 1 M.2 2280 for storage drives, 1 PCIe 3.0 x16, 2 PCIe 3.0 x1, 1 PCIe 3.0 x4 slot using x16 connector for Optane support 2 Graphics : Intel HD Graphics 530 Audio : Conexant CX20632 codec with universal audio jack and 2W internal speaker, headset and headphone front ports (3.5 mm), multi-streaming capable Communications : Intel  I219LM Gigabit Ethernet Port I/O Ports : Front: 1 headset connector, 1 USB 2.0 (fast charging), 1 USB 2.0, 2 USB 3.1 Gen 1, 1 USB Type-C? (charging), 1 SD 4 card reader (optional), Back: 1 RJ-45, 2 USB 2.0, 1 power connector, 4 USB 3.1 Gen 1, 1 audio-in; 1 audio-out, 1 DisplayPort? 1.2 Power : 180 W or 250 W Dimensions : 17 x 27.4 x 33.8 cm Weight : 7.14 kg